Adding "Resource Pool" as a new attribute would require an Enhancement Request.

In the meantime, if you can craft a SQL query against the UIM database that returns a unique set of cs_id values for devices with a "Resource Pool" associated with them, you should be able to use the SQL option in the dynamic filter to return a list of devices that meet your match criteria.

Once you have enable the global database debug, open the device details for one of your devices where you see the Resource Pool attribute displayed for the device. You can then check the portal.log file on the UMP robot to see if you can determine the SQL query used by the USM portlet to retrieve this information. This will let you know the table(s) involved in the query to get this information for the one device. You can then use this as a starting point to craft the SQL query you would need to create a group based on the Resource Pool device attribute.

That is what I stated in my very first posting. You will need to tweak that query so that it returns only the cs_id. Since the CM_DEVICE table contains a column for the cs_id, the following query should work:

If you get duplicate cs_id's in the output (because multiple dev_ids match for the same cs_id), you may have to tweak this query further. I am not a SQL query expert, but I think that this query will assure that you only get 1 cs_id for each match found: